My friend owns a timeshare. We get together once a year to hang out. They STILL make her go to those meetings to upsell her crap. I go sit with her and listen to them. While not the top of the to do list, we make it fun.
No one can force you to do that! All she needs to say is no. Simple. I owned a timeshare at one time and every time I checked in they tried to get me to go to the upsell meetings. Unless she wants the trinkets or gift crds they hand out like halloween candy a stern No will do it.